Heart rate monitor



FIG. 1 is a front perspective view of a heart rate monitor showing ournew design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another front view thereof, in which the heart rate monitor isshown in an example environment shown in broken lines.

The broken lines are for illustrative purposes only and form no part ofthe claimed design.

CLAIM The ornamental design for a heart rate monitor, as shown anddescribed.